My two friends (a recently married couple) and I had a lovely stay at Olga's place during Songkran. The studio is super comfortable, had all the amenities we needed and is located in the fantastic residential neighbourhood of On Nut. Check-in was made super easy and he host gave us tips of where to eat, transportation, etc...
I've stayed in many airbnbs in Bangkok and I would recommend Olga's place beyond all!